Drill sharpener



l June 14, 1927.

1,632,621 A. E. PETERS DRILL SHARPENER Filed Dec. 1'7, 1925 2Sheets-Sh'eet l INVENTOR.

BY 5M June 14 1927.-

A. E PETERS DRILL SHARPENER Filed Dec. 17, 1925 2 Sheets-Sheet 2 LilINVEN TOR. Artku 21E, BfGZJ.

. HIS A71 "EX Patented June 14, 1927.

UNITED AT-E PA E FF ARTHUR 1:. PETERS, or rmmm rcoeoaam; Assrenort ToIncrement-RAND GOM- i rANY,or JERSEY CITY, NEW JERSESLA conroRArIon orew JERSEY.

DRILL sHARrENEn.

Application filed December 17,1925; Serial No. 76 007.

This invention relates to drill sharpeners,

but moreparticul'arly to a guidingmeansfor a drill sharpenerm Theobjects of he invention are to insure alignment of ,thecrosshead withrespect to the anvil block; to impart rigidity to sharp Other objectswill enersof this type andto reduce friction between the relativelymovable surfaces of the 'sharpener.

in part pointed out hereina ter.- I Theinvention consists of thecombinations of elements, features of construction, and

arrangement of parts having the general mode of operation substantiallyas hereinaft'er described and more particularly pointed outin theappended claims and illustrated in the accompanying drawings, in which-Figure 1 is an elevation'partly broken zo'away illustrating the mannerin which the @a hollow base B having formed integrally therewith araising cylinder C. The-upper;

I posts hold the'piston and the crosshead' in spacedrelation withrespect to each other, Figure is an elevation. partly broken awayshowing the manner in which the crosshead is held in alignment withtheanvil block, and r i Figure 3 a transverse view taken through FigureiQon the line 3-3 looking 3 in the direction'of the arrows.

Referring to the drawing, indicated generally-by A is provided with endof the base Bis in'this instance pro- 'vided with a lateral flange'Dwhich supports an anvil block E; The anvil block E may 1 be secured tothe base B in any suitable man- 'finer, as for instance by bolts F, andhas formed integrally therewith'a clamping cylinderG. 'Within thecylinder G is arranged a reciprocatory piston H'which carries at itslower side a reduced extension'in the form of a piston J whichreciprocates Within the raising c linder C. 7 Secure atone end to thepiston 11 in any suitable manner are a" pair of main posts K located ona diameter extending through the longitudinal axis of the ma chine.These posts extend slidably through sleeves L fitted in the anvilblock Eand support at their outer ends a cross head 0.

The inner ends or heads G of the posts abut the piston H and are locatedas shown within the clamping cylinder G. The outer ends of the posts Kare preferably screw threadart obvious and the sharpener ed as at P toreceive suitable nuts Qwhereby the cross head O is clamped securelyagainst shoulders R on the posts K: By

less readily accessible portion-of the machineg's 1 Y The admission Il-S. Patent N o. 1,501,918for sharpener for drill steels, granted July22,1924, to my self and Mortimer S. Parkhill,

of'pressure fluid to the raising cylinder. C and the clampingcylinder IG is preferably controlled by a l common controlling means such as thatdisclosed in Accord- I (iii ingly, a valve chest S is securedto thesidechest S is arranged asuitable valve (not of the anvil block Within thevalve shown) 'operativelyconnectedlwit h a lever T whereby the valve maybe nianuallyfac- -tuated for controlling the admission of pressure fluidto the cylinders andthe exhaust of pressure fluid therefrom in themanner descrlbedin theaforesaid patent. i 1

In adjacent faces U andVwf the anvil block E and thecross head 0respectively areformed recesses or sockets TV and X forlthe reception offorming dies Y' and Z.

v.The forming dies Y and Zillustratedinthe drawings are in this instanceadapted for forming thefiared portion or bit end of a drill steel andare held in interlocking engagement with the anvil block and the crosshead by means ofbolts b. The sockets W and'X arepreferably formedintermediate the ends of the faces U and V, If desired, additionalsockets may he formed in the :faces U and Vf, as for instance sockets cand 61 formed near corresponding ends of the anvil block E and thecrosshead '0 respec .tively for the reception of the shearing knives eand f, orfor other similar devices.

Means are provided for forming the cut ting bit on drill steelsafter-the flared bit end has been formed on the steel. -To this end acylinder 9 is preferablyfsecured-on one side of the anvil block E atright angles to the diametric line of the main posts and coaxially withthe die Y. The cylinder g is providedwith a suitable hammer piston' (notshown) adapted to deliver blows on a forming dolly it supported by afronthead j and extends into thecylinder g to receive the blows of thehammer piston in said cylinder.

block In accordance with the present invention, a pair of holes areformed in the anvil block E and preferably on corresponding sides of theposts K and in line therewith and substantially at right angles to thediameter on which the posts K are located. \Vithin the holes is arearranged guiding columns 0 provided with annular grooves p on thatportion which extends into the holes 70. Pins 9 in this instance extendtransversely through the anvil block E and cooperate with the annulargrooves p for preventing endwise movement of said columns. The

said guiding columns o are supported in the sharpener.- By means ofthese columns,- the cross head 0 will at-all times be held in alignmentwith the anvil block E and the posts K will at all times be protectedagainst undue strains to whichthey would ordinarily be subjected whenthe cross headO descends on the article being formed.

Heretofore, inmachines of this type, continued side thrust to which theposts K, or

their equivalent, are constantly subjected, caused considerable wear onthe posts and on the parts through which they reciprocate.

- Such-side thrust is, of course, more severe when the machine is beingused for forming or. sharpening than when it is used merely as a visefor clamping the drill steel during the sharpening operation.- Owing tothe wear thus caused on the reciprocatory parts of the machine, thecross head at times tends to tilt somewhat, thus making it diliicult toproperly form the drillsteel or other article. By means of the presentinvention, however, such side thrust against the posts is greatlyminimized, the postsand cooperative parts will be protected againstwear,-

and in consequence will render satisfactory service for a considerablylonger period of time than will similar parts in machines unprovidedwith this feature.

I claim:

1. In a drill sharpener, the-combination of a clampingcylinder, a pistonreciprocating in said cylinder, a stationaryanvil block,

two posts secured to the piston and located on a diameterextendrngthrough the longiwith the anvil block and side thrust andtilting of the cross head under impact is prevented.

2. In a drill sharpener, the combination oi a clamping cylinder, apiston to reciprocate in said cylinder, an anvil block integral withtheeylinder and 'lorn'iing ahead tor one end of the cylinder, a crosshead, a pair oi posts for holding the cross head and the piston inspaced relation with respect to each other, said posts being slidablethrough the anvil block, a pair of guide columns seated at one end inthe anvil block and extending slidably through the cross head forinsuring alignment of the cross head with the anvil block, recesses inthe anvil block and cross head located between the posts and guidingcolumns for'holding dies,'and pins through the anvilblock to cooperatewith the guide columns for holding said columns against endwisemovement.

3. In a drill sharpener, the combination of a base having a flange, araising cylinder integral with said base, an anvil block having aclamping cylinder supported on said flange, a piston in said clampingcylinder having a reduced extension in said raising cylinder, a movablecross head above said anvil block, two main posts having their lowerends secured tothe clamping piston and passing through the anvil block,the

upper ends being secured to the cross head,

said posts being located on a diameter extending through thelongitudinal axis of the machine, a dollying device mounted at rightangles to the diamctric line of the said main posts, two guiding columnsfor the cross head supported in the anvil block at that side of theanvil block adjacent the dollying device and located on linessubstantially at right angles to the diametric lines passing through theaxes of the main posts, and recesses in the anvil block and cross headlocated between the posts and guiding colunms for holding dies, wherebythe cross head is heldin aligmnent with the anvil block and side thrustand tilting of the cross head under impact of the forging operations isprevented.

In testimony whereof I have signed this specification.

ARTHUR E. PETERS.

